The Cummins L-series engine is a straight-sixdiesel engine designed and produced by Cummins. It displaces 8.9 litres (543.1 cu in), and began production in 1982 as the L10 at the Jamestown Engine Plant in Jamestown, New York. After lengthening its stroke from 136 to 147mm, its displacement was enlarged to 10.8 litres and the engine renamed ISM 11, later M11.
The ISL 9 and current L9 engines are not related to the L10 engine, but instead based on the smaller C-series platform with the 135mm stroke of the C8.3 enlarged to 144.5mm, together with 4 valves per cylinder, giving it 8.9 litres displacement.
[1] The L10 displaced 10.0 litres (610.2 cu in), and was available in either a vertical form, for upright use in trucks and buses, or horizontal form, for underfloor use in buses and trains. The L10 was Cummins's first competitive offering in the British bus market, as their earlier production had been too large and heavy.[2] However, it had a troublesome introduction to the British market, with high oil consumption and sealing problems.
By 1994, it had been developed into the M11, and in 1998, Cummins ceased production of the old L-series engine. After the original L10 evolved into the M11 engine, the new ISL9 engine was introduced to operate in this market segment, yet with a better power-to-weight ratio, by enlarging the piston stroke of the older C8.3 engine. The Cummins L10 also has a sister engine which runs on compressed natural gas (CNG).[3] The engine was introduced in 1992 as the L10G before being replaced by the L Gas Plus in 2001 until it became the ISL G in collaboration with Westport Innovations in 2008, now based on the C-series engine architecture. The ISL engines were manufactured at plants in Rocky Mount, North Carolina and Darlington, England.
In 2016 onwards, the ISL9 was simplified to L9, though physically it shares no resemblance to the old L10 engine: The current L9 engine is a stroked version of the C8.3 engine platform, while the current M11 engine is a stroked version of the original L10 engine platform.
In February 2023, Cummins announced that the L9, alongside the X12, would be replaced by the X10 engine, which is slated for introduction in 2026 for the North American market.[4]
1,050 pound force-feet (1,424 N⋅m) at 1300 rpm, 310 horsepower (231 kW; 314 PS) electronically governed at 2100 rpm
1,150 pound force-feet (1,559 N⋅m) at 1300 rpm, 330 horsepower (246 kW; 335 PS) electronically governed at 2100 rpm
1,200 pound force-feet (1,627 N⋅m) at 1300 rpm, 400 horsepower (298 kW; 406 PS) electronically governed at 2200 rpm
Referencesedit
^. Archived from the original on 2017-12-01. Retrieved 2017-12-01.
^Kennett, Pat (June 1986). "The Cummins Beat". TRUCK. London, UK: FF Publishing Ltd: 55–56.
^"Cummins Engines". Cummins Inc. Retrieved 2020-10-05.
^"Cummins announces new X10 engine, next in fuel-agnostic series, launching in North America in 2026". Cummins Newsroom. Cummins, Inc. 2023-02-13. Retrieved 2023-07-01.
^"Cummins Engines". Cummins Inc. Retrieved 2020-10-05.
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This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations November 2010 Learn how and when to remove this message The Cummins L series engine is a straight six diesel engine designed and produced by Cummins It displaces 8 9 litres 543 1 cu in and began production in 1982 as the L10 at the Jamestown Engine Plant in Jamestown New York After lengthening its stroke from 136 to 147mm its displacement was enlarged to 10 8 litres and the engine renamed ISM 11 later M11 Cummins L seriesOverviewManufacturerCumminsAlso calledISL L Gas Plus ISL G ISL9 L9 L9NProduction1982 presentLayoutConfigurationStraight six diesel engineDisplacement8 9 litres 543 1 cu in except for L10 which is 10 litres 610 2 cu in Cylinder block materialCast ironCylinder head materialCast ironValvetrainOHVCombustionTurbochargerWaste gateManagementmechanicalFuel typeDiesel Natural GasOil systemWet sumpCooling systemWater cooledChronologySuccessorCummins X10 The ISL 9 and current L9 engines are not related to the L10 engine but instead based on the smaller C series platform with the 135mm stroke of the C8 3 enlarged to 144 5mm together with 4 valves per cylinder giving it 8 9 litres displacement 1 The L10 displaced 10 0 litres 610 2 cu in and was available in either a vertical form for upright use in trucks and buses or horizontal form for underfloor use in buses and trains The L10 was Cummins s first competitive offering in the British bus market as their earlier production had been too large and heavy 2 However it had a troublesome introduction to the British market with high oil consumption and sealing problems By 1994 it had been developed into the M11 and in 1998 Cummins ceased production of the old L series engine After the original L10 evolved into the M11 engine the new ISL9 engine was introduced to operate in this market segment yet with a better power to weight ratio by enlarging the piston stroke of the older C8 3 engine The Cummins L10 also has a sister engine which runs on compressed natural gas CNG 3 The engine was introduced in 1992 as the L10G before being replaced by the L Gas Plus in 2001 until it became the ISL G in collaboration with Westport Innovations in 2008 now based on the C series engine architecture The ISL engines were manufactured at plants in Rocky Mount North Carolina and Darlington England 1 In 2016 onwards the ISL9 was simplified to L9 though physically it shares no resemblance to the old L10 engine The current L9 engine is a stroked version of the C8 3 engine platform while the current M11 engine is a stroked version of the original L10 engine platform In February 2023 Cummins announced that the L9 alongside the X12 would be replaced by the X10 engine which is slated for introduction in 2026 for the North American market 4 Contents 1 Models 2 Popular power ratings 3 References 4 External linksModels editMaker Name Displacement Fuel Years in production Found in Cummins L10 10L Diesel 1982 1998 Rigid transit buses Articulated Farm Tractors ISL 8 9L 1999 2007 Rigid transit buses Articulated transit buses Diesel electric hybrid motorcoaches ISL9 2007 2017 L9 2017 present Cummins Westport L10G 10L CNG 1992 2001 Rigid transit buses L Gas Plus 8 9L Natural Gas 2001 2008 Rigid transit buses Articulated transit buses some CNG motorcoaches ISL G 2008 2018 ISL G NZ L9N 2018 presentPopular power ratings editDiesel powered urban bus 5 730 pound force feet 990 N m at 1300 rpm 250 horsepower 186 kW 253 PS electronically governed at 2200 rpm 900 pound force feet 1 220 N m at 1300 rpm 280 horsepower 209 kW 284 PS electronically governed at 2200 rpm 1 100 pound force feet 1 491 N m at 1300 rpm 330 horsepower 246 kW 335 PS electronically governed at 2200 rpm Natural gas powered urban bus L Gas Plus ISL G ISL G NZ L9N 6 7 900 pound force feet 1 220 N m at 1300 rpm 280 horsepower 209 kW 284 PS electronically governed at 2000 rpm 860 pound force feet 1 166 N m at 1300 rpm 300 horsepower 224 kW 304 PS electronically governed at 2100 rpm 1 000 pound force feet 1 356 N m at 1300 rpm 320 horsepower 239 kW 324 PS electronically governed at 2000 rpm Firetruck motorhome truck citation needed 1 050 pound force feet 1 424 N m at 1300 rpm 310 horsepower 231 kW 314 PS electronically governed at 2100 rpm 1 150 pound force feet 1 559 N m at 1300 rpm 330 horsepower 246 kW 335 PS electronically governed at 2100 rpm 1 200 pound force feet 1 627 N m at 1300 rpm 400 horsepower 298 kW 406 PS electronically governed at 2200 rpmReferences edit Worldwide Manufacturing Locations Cummins Archived from the original on 2017 12 01 Retrieved 2017 12 01 Kennett Pat June 1986 The Cummins Beat TRUCK London UK FF Publishing Ltd 55 56 Cummins Engines Cummins Inc Retrieved 2020 10 05 Cummins announces new X10 engine next in fuel agnostic series launching in North America in 2026 Cummins Newsroom Cummins Inc 2023 02 13 Retrieved 2023 07 01 Cummins Engines Cummins Inc Retrieved 2020 10 05 Cummins Westport ISL G Models Cummins Westport ISL G Near Zero Models External links editCummins website Cummins Westport CNG website 2 Retrieved from https en wikipedia org w index php title Cummins L series engine amp oldid 1216744731, wikipedia, wiki, book, books, library,
